To minimize variability of OGTT results, participants will be asked to eat as they usually do throughout the study. Participants will be asked to refrain from vigorous physical activity for 8 hours prior to each OGTT and to minimize their physical activity during each OGTT. Participants will complete a Perceived Stress Scale and a 24-hour food, alcohol, and activity recall for the day before each OGTT to analyze potential confounding effects of stress, diet, alcohol, and physical activity on the results.